Mating disruption for control of Melanotus okinawensis (Coleoptera: elateridae) with synthetic sex pheromone.
A mating disruption experiment to control Melanotus okinawensis Ohira (Coleoptera: Elateridae) was conducted at a sugarcane (Saccharum spp.) field and a wild Japanese pampas, Miscanthus sinensis Anderss, grassland on Minami-Daito Island (3,057 ha) from 2001 to 2007. The sugarcane field and the pampas grassland were treated with synthetic sex pheromone that evaporated from a polyethylene tube dispenser. The mean total catches obtained by monitoring traps in the sugarcane fields decreased by 96.1% in 2001 from the previous year on Minami-Daito Island. The mean total trap catches in the treated area further decreased by 74.0% from 2001 until 2007 as cumulative effects. Simultaneously, the number of adults captured by hand decreased from 4.7 per sugarcane field in 2001 to 0.5 in 2007 (89.3% reduction), whereas those captured in the untreated area (Miyagi Island) did not show such a decrease. The mating rates were significantly lower in the females captured in the treated area (14.3-71.4%) than those in the untreated area (96.9-100%). However, the amount of the decrease in the trap catches was relatively small at first (39.6% reduction) in the Japanese pampas grassland on the periphery of the Island. This was probably due to the loss of pheromone substance caused by the strong seasonal wind in the periphery. However, mean total trap catches at the periphery also decreased within several years; significant decreases were detected until 2003, 2006, and 2007. These results indicated that the mating disruption effectively reduced an isolated population of M. okinawensis.
Arakaki
Norio
N
Okinawa Prefectural Agricultural Research Center, Itoman 901-0336, Japan. arakkinr@pref.okinawa.lg.jp
Nagayama
Atsushi
A
Kobayashi
Aya
A
Hokama
Yasuhiro
Y
Sadoyama
Yasutsune
Y
Mogi
Noriaki
N
Kishita
Mitsunobu
M
Adaniya
Ken
K
Ueda
Kenjiro
K
Higa
Motoaki
M
Shinzato
Toshinobu
T
Kawamitsu
Hiroshi
H
Nakama
Shigeru
S
Wakamura
Sadao
S
Yamamura
Kohji
K
D000818:Animals; D001517:Coleoptera / Q000187:drug effects* / Q000502:physiology; D005260:Female; D008297:Male; D010572:Pest Control, Biological; D031786:Saccharum / Q000469:parasitology; D012621:Seasons; D012724:Sex Attractants / Q000494:pharmacology*; D012744:Sex Ratio; D012726:Sexual Behavior, Animal / Q000187:drug effects*
D012724:Sex Attractants